May 20, 2015 Complement Activity, Total (CH50) Effective date: May 25, 2015 The following changes will apply for Complement Activity, Total (CH50) measurement:  Methodology from current EIA to turbidimetry  Reference range 41.68 - 95.06 U/ml (adult). Range not established for pediatric age groups  Availability: Monday - Friday 8:00 a.m. – 4:00 p.m.  Average turn-around-time: 1 week  Sample requirements: Serum 1mL minimum. Must be separated and frozen within 1 hour of collection. Please see instructions in the DSM LIM  Performing site: HSC Immunology Any questions or concerns may be directed to: Dr. Carmen Morales, Medical Director, Hematology and Immunology Disciplines, 204787-4682, cmorales@dsmanitoba.ca Sheila Ozamoto, Technical Director, Immunology, 204-787-3407, sozamoto@dsmanitoba.ca -1dsmanitoba.ca Suite 1502 – 155 Carlton Street Winnipeg, Manitoba R3C 3H8 155, Rue Carlton, suite 1502 Winnipeg (Manitoba) R3C 3H8 T 204.926.8005 1.866.320.8796 – Toll-free Manitoba only F 204.940.1761